The Platteville high power facility


  • J. C. Carroll,

  • E. J. Violette,

  • W. F. Utlaut


The Department of Commerce's Platteville transmitter facility has been used to modify the ionosphere since 1970. Design concepts and a description of major components at the facility are discussed. When used for ionospheric modification studies, one of two 10-element ring-array antennas, each producing right- or left-handed circularly polarized signals, is excited by a transmitter which develops up to 2 Mw of average power. These arrays permit operation in the frequency range from 2.7 to 10 MHz, as required to approximately match varying ionospheric critical frequencies.